More than 130,000 thousand people from across 185 countries have subscribed to TT+.
The digital channel was launched in April as part of a strategy to support the long term sustainability of the event.
More that 57,000 people accessed the live TT coverage, with the channel seeing more that 700,000 hours viewed by fans.
Minister for Enterprise, Tim Crookall, says the TT Races will continue to focus on audience growth.
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